2017-12-19 15:49:03 +00:00
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/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2017 Intel Corporation
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2017-10-07 14:56:41 +00:00
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*/
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#ifndef _GSO_TUNNEL_TCP4_H_
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#define _GSO_TUNNEL_TCP4_H_
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#include <stdint.h>
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#include <rte_mbuf.h>
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/**
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* Segment a tunneling packet with inner TCP/IPv4 headers. This function
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* doesn't check if the input packet has correct checksums, and doesn't
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* update checksums for output GSO segments. Furthermore, it doesn't
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* process IP fragment packets.
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*
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* @param pkt
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* The packet mbuf to segment.
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* @param gso_size
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* The max length of a GSO segment, measured in bytes.
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* @param ipid_delta
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* The increasing unit of IP ids.
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* @param direct_pool
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* MBUF pool used for allocating direct buffers for output segments.
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* @param indirect_pool
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* MBUF pool used for allocating indirect buffers for output segments.
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* @param pkts_out
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* Pointer array used to store the MBUF addresses of output GSO
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* segments, when it succeeds. If the memory space in pkts_out is
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* insufficient, it fails and returns -EINVAL.
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* @param nb_pkts_out
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* The max number of items that 'pkts_out' can keep.
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*
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* @return
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* - The number of GSO segments filled in pkts_out on success.
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* - Return -ENOMEM if run out of memory in MBUF pools.
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* - Return -EINVAL for invalid parameters.
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*/
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int gso_tunnel_tcp4_segment(struct rte_mbuf *pkt,
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uint16_t gso_size,
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uint8_t ipid_delta,
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struct rte_mempool *direct_pool,
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struct rte_mempool *indirect_pool,
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struct rte_mbuf **pkts_out,
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uint16_t nb_pkts_out);
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#endif
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